22021002011 has 4 divisors (see below), whose sum is σ = 22044504552. Its totient is φ = 21997499472.

The previous prime is 22021002001. The next prime is 22021002077. The reversal of 22021002011 is 11020012022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22021002011 - 2¹⁰ = 22021000987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22021001983 and 22021002001.

It is not an unprimeable number, because it can be changed into a prime (22021002001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11749865 + ... + 11751738.

It is an arithmetic number, because the mean of its divisors is an integer number (5511126138).

Almost surely, 2^22021002011 is an apocalyptic number.

22021002011 is a deficient number, since it is larger than the sum of its proper divisors (23502541).

22021002011 is an equidigital number, since it uses as much as digits as its factorization.

22021002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23502540.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22021002011 its reverse (11020012022), we get a palindrome (33041014033).

The spelling of 22021002011 in words is "twenty-two billion, twenty-one million, two thousand, eleven".